public class Example7_3 {
   public static void main (String args[]) {
     HelloMachine machine=new HelloMachine();
     machine.turnOn( new SpeakHello() {
                      public void speak() {
                        System.out.println("hello,you are welcome!");
                      }
                   }
                 );
    machine.turnOn(new SpeakHello() {
                      public void speak() {
                         System.out.println("你好，欢迎光临！");
                      }
                  }
               );
   }
}
